氟锆酸盐玻璃中Tm^（3＋）对Er^（3＋）可见发光的猝灭

QUENCHING OF VISIBLE FLUORESCENCE OF Er￣(3+) IONS BY Tm￣(3+) IONS IN A ZBLAN GLASS

本文研究了氟锆酸盐玻璃中Ｔｍ３＋与Ｅｒ３＋的能量转移，在不同激发彼长激发下，能量转移的机制有不同之处．Ｔｍ３＋对Ｅｒ３＋的作用表现在使得２Ｈ１１／２和４Ｓ３／２的发光减弱，４Ｆ９／２和４Ｉ１１／２的发光增加，即将Ｅｒ３＋高能级的粒子搬运至低能态上．在一定条件下甚至可以完全猝灭４Ｓ３／２的荧光．

he investigation to energy transfer between Tin3+ and Er3+ ions in a ZBLAN glass has been made.The energy transfer under excitation of different pumping wavelengths is of difference.Effects of Tin3+ ions are to lower the fluorescence intensities of 2H11/2 and 4S3/2 of Er3+,and to enhance the fluorescences of 4F9/2 and 4I11/2,that is,the population of high-lying energy levels has been moved to the low-lying states.Under certain circumstances,the fluorescence of 4S3/2 is quenched completely.